B.C.’s police watchdog has announced it is investigating two officers in connection to the death of Langley teen Carson Crimeni, who died of a suspected overdose earlier this month.

The last moments of the 14-year-old’s life were recorded and posted to social media. Disturbing video clips show the Langley teen barely able to stand or speak at the Walnut Grove skate park on the night of Aug. 7 while people can be heard laughing.

The Independent Investigations Office issued a press release on Thursday stating police were called about the incident around 8 p.m., but did not locate him.

“A call was received from a complainant who had seen a snapchat photo of the youth from an unknown source and was concerned for his welfare,” according to the IIO release. “Two officers attended the location to conduct a welfare check but could not locate the youth.”

The IIO is now investigating to determine what role, if any, the officers’ actions or inaction may have played in the incident that followed.

Anyone who heard or may have seen officers is asked to contact the IIO witness line at 1-855-446-8477.

The IIO is the independent civilian oversight agency of the police in British Columbia. It investigates all officer-related incidents that result in serious harm or death, whether or not there is any allegation of wrongdoing.